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What can cause a DCR (dynamic contact resistance) failure?

DCR (dynamic contact resistance) failures are caused usually by some malfunction of the reed switch and they include:

  • an over stressed reed switch usually produced during assembly
  • a small crack on the reed switch seal
  • a broken reed switch
  • plating or sputtered contact materials cracking or peeling
  • improper air mixture internal to the contacts
  • particles on the reed contacts
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